JSON tools that run in your browser

Format, convert,and diff JSON —without leaving your browser.

Fast. Private. No uploads.

Open Formatter Try Diff

example.json

{
  "tool": "jsonic",
  "version": "1.0.0",
  "features": [
    "format",
    "validate",
    "diff"
  ],
  "private": true,
  "latency": 0
}

01JSON FormatterFormat, validate, minify, inspect, and download JSON. Tree view, line numbers, file upload.formattervalidatorminifier→02JSON to TypeScriptGenerate TypeScript interfaces from JSON, including nested objects, arrays, and union types.interfacetypesschema→03JSON to CSVConvert JSON arrays into CSV, flatten nested objects, copy, or download the result.csvflattenexport→04JSON to YAMLConvert JSON to YAML format. Supports nested objects, arrays, and all JSON types.yamlconvertconfig→05CSV to JSONConvert CSV to a JSON array. Handles quoted fields, type coercion, and download.csvimportarray→06JSON DiffCompare two JSON objects with structural diff, line numbers, and inline highlights.comparediffchanges→

Why Jsonic?

Many JSON utilities are slow, cluttered, or force you into upload-heavy workflows. Jsonic keeps common developer tasks local, fast, and focused.

Privacy-first by default

Formatting, conversion, and diffing run entirely in the browser. Your JSON stays on your machine unless you choose to copy it elsewhere.